Improvement in pattern-chain for looms



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@wat dtjljlra HILAS DAVIS, OF NORTH ANDOVER, MASSACHUSETTS.

Letters Patent No. 102,094, dated April 19, 1870.

IMPROVEMENT IN PATTERN-CHAIN FOR LOOMS.

The Schedule referred to in these Letters Patent and making part of the same Y Nature and Objects of the Invention.

My improvements relates to the manner of constructing the pattern-chain, so-called, which is used in fancylooms to select the heddles which are to be raised or depressed to form the sheet, or to select the shuttle that is to be thrownat each pick, if several shuttles are used.

The kind of patternchain to which my improvements apply is that where the chain is made up of plates or cards, perforated with holes, and -operate upon needles or pushers-much in the same way that the cards operate in the well-known J acquardloom.

My invention consists in forming each plate or card -with as many holes through it as there are needles or pushers to be operated, or otherwise removing so much 'of the plate as will permit the needles to pass through it; and in combining with this a series of separate, changeable, secondary plates, one for each leaf of heddles, which rests upon the main plate or card, each of which plates has a hole or holes through it so located that when the small plate is in one position its hole or holes will coincide with the hole or holes in the large plate or link, and when it is turned round or reversed it will close the hole, and, it desired, will open another hole or holes.

By this means every figure within the capacity of the heddles may be woven from the same patternchain by properly arranging the small plates upon the main platey or card, and this may be done without removing the chain from the loom, as'will be described. Description. In the accompanying drawings- Figure 1 represents the. pattern-plate or card, in

Figure 2 is a plan of the under side of the same.'

Figure 3 is a longitudinal section, and

Figure 4 is a transverse section of a portion of the chain and prism upon which it is worked.

The chain here shown is such as I propose. to employ to select the heddles when two needles or pushersare to be used for each leaf, to make the selection positive, instead of one needle or pusher for each leaf, as is usual, and therefore twice as many-holes are used in each card as is the case where a single needle or pusher is used for each leaf. But the mode of operation of opening or closing the holes in the card or plate by means of'gthe secondary reversible plates is precisely the same in each case.

`Ais the link or card, which is formed of sheet metal, and provided with a series of holes, a a', b b', c c', Snc., of the proper distance apart to receive the needles or pushers, or, instead of the holes, the metal might'be cut away in the form of a long slot, or, it' the chain is to be' used with a single series of needles, the holes a b c', &c., might be omit-ted.

Each end of the card is provided with slots B torev eeive the links C, by which the cards are formed into an endless chain, and with holes D to receive the steady-pins E upon the card-prism F, as is usual in Jacquard looms.

.Lhe opposite edges of ythe intermediate part of the card is turned over so as to form two grooves facing inward, as is shown, into which the series of secondary plates G G,'&c., are slipped from one end and held therein by the elastic stops H H', as is shown.

Each plate G occupies a length upon the card corresponding to one leaflof the heddles, and has ahole, I, made through it at one side of' the center, and is so arranged in relation to the needles and holes through the main plate or card that when the small plate is in one position the hole in it will coincide with one ofthe holes in the card, and therefore be open to the passage of the needle, and when it is turned-round the hole will be closed and the plate will intercept the needle and push it forward in the usual way, so that each needle may be pushed or left as may be desired, independently of the others.

The stop His made in one piece with the joint-wires at the end of the plate, asis shown, which are secured to the plate by turning the metal over theln in a wellknown manner.

The other stop, H', has one end only connected with the joint-wire, and the other end rests in the opposite groove that holds the plates G, and its middle rests against the edge o f the outside plate, as shown, and by its elasticity h'olds the plates firmly together edgewise.

To remove the plates to change them, the free end of the stop H is sprung out of the groove and turned back in the position shown by the dotted lines, which leaves the plates G free to be drawn out between the links C, the plates or cards A being made of a greater' width at the ends than inthe middle, for that purpose.

lVhile the plates G are being changed, the end of the card having the stop H may be slightly raised, it' necessary, to allow the plates topass over the steadypin E in the prism. lhus lthe pattern-chain may be changed from one ligure to another without removing it from the loom, in a perfectly obvious manner.

What I claim as my invention is- The combination ot' a series of detached reversibleplates, with the main plate-or link, to form the working-card of as pattern-chain, substantially as described.

Executed March 12, 1870.

' HILAS D. DAVIS.

Witnesses D. B. HANsoN, WM. C. HIBBARD, 

